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mycnc:mycnc_advantages [2019/05/14 13:19]
ivan
mycnc:mycnc_advantages [2019/05/14 13:34] (current)
ivan
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 When loading the control system, the following parameters will be loaded from the cut charts (provided they have been inputted) ​ When loading the control system, the following parameters will be loaded from the cut charts (provided they have been inputted) ​
-  * cutting ​speed +  * Cutting ​speed 
-  * ignition ​height +  * Ignition ​height 
-  * punching ​height +  * Punching ​height 
-  * punching ​time +  * Punching ​time 
-  * cutting ​height (arc reference voltage for THC)+  * Cutting ​height (arc reference voltage for THC)
   * Cutting current   * Cutting current
-  * The magnitude ​of current decrease at the trajectory corners +  * Magnitude ​of current decrease at the trajectory corners 
-  * Cut width adjustment (Kerf)+  * Cut width adjustment (kerf)
   * Crawling speed (during punching through)   * Crawling speed (during punching through)
   * Driving time at creeping speed (when punching)   * Driving time at creeping speed (when punching)
Line 106: Line 106:
   * Gas parameters for manual and automatic Hypertherm console (type of cutting and shielding gases, MixGas1, MixGas2 gas mix values, plasma torch cutting and shielding channel pressure values ​​during Preflow and Cut)   * Gas parameters for manual and automatic Hypertherm console (type of cutting and shielding gases, MixGas1, MixGas2 gas mix values, plasma torch cutting and shielding channel pressure values ​​during Preflow and Cut)
   * Consumable components of the plasma torch as auxiliary information for the operator of the machine (types of electrodes, nozzle, protective nozzle, protective cap, swirl and water tube)   * Consumable components of the plasma torch as auxiliary information for the operator of the machine (types of electrodes, nozzle, protective nozzle, protective cap, swirl and water tube)
 +
 +
 +{{mycnc:​screens:​mycnc-profiles--47.png}}
 +{{mycnc:​screens:​mycnc-profiles--65.png}}
 +{{mycnc:​screens:​mycnc-profiles--66.png}}
 +
 +===Torch Height Control===
 +Unlike many CNC systems, myCNC has full integration of the THC (torch height control) system. This brings along the following benefits:
 +  * Cutting height (THC reference voltage) is set in the CNC system itself (not on an external THC, as in many other systems). In addition, the optimal value for the cutting height can be loaded from the Cut Chart when selecting the material thickness.
 +  * The system implements several algorithms to prevent the plasma torch from diving - a THC start delay, THC preemptive shutdown, and THC momentary shutdown when cutting speed drops below a predetermined value, as well as during abrupt voltage surges. ​
 +
 +<​code>​
 +
 +NOTE:
 +
 +Arc voltage is not stable for the first few tens or hundreds of milliseconds ​
 +after the material has been punched through.
 +
 +At the end of the cutting process, the plasma torch passes over an already cut out trajectory,
 +where the arc length and the arc voltage increase.
 +
 +The arc also lengthens and its voltage increases at the corners of its path as the
 +cutting speeds lower and and more material is burned though.
 +
 +When the arc passes through the cut, the arc voltage can increase ​
 +up to a few dozen volts.
 +
 +All of these factors can lead to short-term diving when running THC,
 +leading to the plasma torch nearly touching the material
 +
 +Timely reactions to such situations and short-term blocking of
 +torch height control in such scenarios is an effective method of diving prevention. </​code>​
 +
 +  * In addition to the work on the pre-set arc voltage (loaded from the table), the THC myCNC system is able to measure the real arc voltage after punching and is to maintain this voltage during the cutting process. This tracking method is becoming increasingly popular, as it allows you to get away from the effect of "​floating"​ the arc voltage during the life cycle of the plasma torch consumables. The arc voltage when using new nozzle electrodes will differ from the arc voltage when using nozzle electrodes that have completed several hundred ignitions. In this case, when the arc voltage is preset (loaded from the table), the system will control the constant voltage level by changing the height of the plasma torch. Turning on the voltage tracking mode will ensure that the plasma torch height remains constant.
        
mycnc/mycnc_advantages.txt · Last modified: 2019/05/14 13:34 by ivan